Puddletag

Fixes for issue 171.

Fixed MusicBrainz not working (issue 170).

Masstagging improvements with regards to both matching (courtesy of beets)
and searching.
$ceiling, $eql, $floor, $round scripting functions.
Full support for Mp3tag tag sources.
Support for MusicBrainz and Discogs new APIs.
More than one file can be written to at a time in the file-view. Just
select more than one file, write to a field and Bob's your aunt.

puddletag now has only two known bugs (and many unknown). That is all. There's some UI changes some new features too for those interested.

No source changes. Added missing files required for Debian packaging.

Did modifications for inclusion into Debian.